Not only is the Arcam 390 an old design, it also reviewed very poorly:
This is a review and detailed measurements of the Arcam AVR390 Audio/Video Receiver (AVR). It is a 7.1.4 unit kindly purchased and drop shipped to me (refurbished unit). It seems to have been announced back in 2017 and available in 2018. I don't know if it is still a current unit or not. It...
www.audiosciencereview.com
As for the "British" aspect, it's more marketing guff than reality these days, with the units being manufactured in that most English of counties - Vietnam
. So I would say the Arcam option would be a poor choice and I would be surprised if anyone recommended otherwise.
As per Gibbsy's advice, the Denon's do most things well and are generally reliable.